In Dungeons And Dragons Adventurer's League Season 8 instead of Gold you get Treasure Checkpoints (TCP). During some sessions the DM has announced we've unlocked a particular item.
I then also understand that TCP can only be used on items from, or below, the tier you earned the points.
For example TCP earned in Tier 2 can be used on Tier 2 and Tier 1 eligible items, but not Tier 3 items. Thus as I just hit level 5 I should use my TCP for something.
My question is are the items that were unlocked during play the only things I can use it on? If not, where do I find a complete list of tier 1 items to spend the TCP on?